bit_floor.hpp

Go to the documentation of this file.

// SPDX-License-Identifier: BSL-1.0
 
#ifndef TETL_BIT_BIT_FLOOR_HPP
#define TETL_BIT_BIT_FLOOR_HPP
 
#include <etl/_bit/bit_width.hpp>
#include <etl/_concepts/builtin_unsigned_integer.hpp>
#include <etl/_limits/numeric_limits.hpp>
 
namespace etl {

template <etl::builtin_unsigned_integer UInt>
[[nodiscard]] constexpr auto bit_floor(UInt x) noexcept -> UInt
{
    if (x != 0) {
        return UInt(1) << static_cast<UInt>(static_cast<UInt>(etl::bit_width(x)) - UInt(1));
    }
    return 0;
}
} // namespace etl
 
#endif // TETL_BIT_BIT_FLOOR_HPP